In our post Mire in Misery black can kind of touch enchantments world, could we see a black destroy target enchantment an opponent controls? That way black can't break their demonic contracts but still gets to hit stuff.

R&D is experimenting with black enchantment removal. You’ll see more of that experimentation in upcoming sets.

Is white's minor new thing going to be similar to mire in misery giving black enchantment removal, where it gets to do something that other colors can do but not as efficient?

It’s nowhere as major as that.

Just saw Mire in Misery, this is the black enchantment removal you've been hinting at right? What is the extent of enchantment removal in black? Is it just edicts?

Here’s what we’re up to. We realized that three different colors could get rid of artifacts (white, red, and green), but only two could get rid of enchantments (white and green). Black seemed like the right choice as it had two permanent types it couldn’t remove. Now, red has trouble with enchantments and black has trouble with artifacts.Our constraints for black were as follows. We definitely want black to be third in efficiency behind white and green. We also didn’t want black to be able to destroy its own enchantments as we like the Deal with the Devil enchantments in black (this was the major reason black hasn’t had enchantment removal). With those constraints, we’ve started designing cards. Our plan is to roll them out slowly, so I don’t believe Throne of Eldraine has one. You will see more though, just slowly.